There are two ways to install it. Please refer to the instruction manual. Requires 4-5 hours of sunlight to ensure the battery is fully charged for the first use. Specifications:6 - Packs NI-CD battery: 1.2V 600mAh Solar panel: 2V 0.26W LED: Warm white / changing color Solar panel charging time: 6 hours Working time: 7 to 9 hours Material: ABS plastic Waterproof: IP65 N.W.: 0.31 ib